Childress, D.S., and Billock J.N., Improved Management of Upper-Extremity Amputees, Digest of the 9th International Conference on Medical and Biological Engineering, p. 165, Melbourne, Australia, 1971.

Childress, D. S., A Control Principle for Above-Elbow Artificial Limbs, Proceedings of the 55th Annual Meeting of the Federation of American Societies for Experimental Biology, Vol 30, No. 2, 709 Abstracts, Chicago, IL, April, 1971.

Childress, D.S., Billock, J.N., Holmes, D.W., NU Myoelectric Below-Elbow Prosthetic System: Myoelectric Theory Socket Principles, Fabrication Techniques, Laboratory Paper.

Grahn, E.C., Keagy, R., Levy, D.C., Pronator Assist, Orthotics & Prosthetics, June, 1971.